Improvement in boring-machines



G GAnnNEm Boring-Machines. No. 146,246. Bateman 1an, `fs, 1874.

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GEORGE GARDNER, 0E GLEN GARDNER, NEW JERSEY.

IMPROVEMENT IN BORING-MACHINES.`

Specification forming part of Letters Patent No. 146,246, dated January 6, A1874 application filed May 27, 1873.

To all whom 'it may concern Be it known that I, GEORGE GARDNER, of Glen Gardner, in the county of Hunterdon, in

` the State of New Jersey, have invented cert, f which was projected primarily with a view to provide convenient means for boring designs or configurations of holes in chair seats and backs, consists in the employment, on an ordinary boring-machine, of a fcenter xed upon the table in line with the axis of the boring stock or spindle, and a pattern containing the particular iigure of holes to be reproduced in the chair seat or back. The pattern, having had a chair seat or back secured to it upon its reverse side, is centered by means of one ot' its holes upon the fixed center of the table, and a corresponding hole bored through the seat or back, after which the connected pattern and seat or back are shifted to the next hole, and so on successively until the entire design hasbeen duplicated in the chair seat or back by the auger or drill.

Figure 1 is aperspective View of a boring- Inachine embodying my improvement. Fig. 2 is a sectional detail view. Figs. 3 and 4 illustrate in perspective two kinds of patterns.

The same letters of reference are used in all the iigures in the designation of identical parts.

The boring-machine delineated in the annexed drawings consists of a bed-plate, A, carrying two fixed standards, B and C, a table, D, secured to the standards, and a boring stock or spindle, E, which turns in bearings on the frame F, which is capable of sliding on the standards B and C, and is depressed by means of a treadle, G, through the medium of a connecting-rod, H. A center, I, is secured upon the table D centrally under the boringstock, being either permanently fixed thereto, or loosely set in a hole or socket therein, so as to project a short distance above the face of the table. The patternK is provided in one side with a configuration of holes, 7c, in which A the center fit-s snugly. y

It is evident that my invention is also ap plicable to mortising-machines, in which the center I may take the form of a blade placed vertically under the edge of the chisel. Lrepresents a pattern for a mortising-machine. i

What I claim as my invention, and desire to secure by Letters Patent, is

The combination of the bed-plate A, having the fixed standards B` C, table D, spindle E, frame F, treadle G, connecting-rod H, center or stop I, and pattern K, substantially as and for the purpose seti'orth.

In testimony whereof I have hereunto signed.n my name this 24th day of April, 1873, in presence of two subscribing witnesses.

GEO. GARDNER.

.PATENT N 

